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EOSE Insider Trading & Form 4 Activity

Eos Energy Enterprises, Inc.
Last filing: Sep 16, 2026·1mo ago· Data may be outdated
BULLISH · LAST 90 DAYS
67%
buyers
$59K
2 buys
$575K
1 sell
-$516K
net selling
2
insiders
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Net flow — last 12 months

Monthly net of insider buys minus sells. Green months indicate net buying; red months indicate net selling.

Most active insiders

Ranked by total transaction value over the last 90 days.

INSIDERBOUGHTSOLDNET
Mastrangelo Joe
Chief Executive Officer
—
$1.6M
-$1.6M
Puri Sumeet
Chief Accounting Officer
—
$411K
-$411K
Kroeker Nathan
Chief Commercial Officer
—
$371K
-$371K
Song Haiyan
Insider
$59K
—
$59K

Recent transactions

Every Form 4 transaction for EOSE, newest first.

SELL10b5-1
Mastrangelo Joe · Chief Executive Officer
Tx Sep 16·Filed Sep 16·EDGAR ↗
250,000 sh @ $3.92
$980K
SELL10b5-1
Puri Sumeet · Chief Accounting Officer
Tx Sep 16·Filed Sep 16·EDGAR ↗
43,750 sh @ $3.92
$172K
AWARD10b5-1
Mastrangelo Joe · Chief Executive Officer
Tx Sep 14·Filed Sep 16·EDGAR ↗
500,000 sh
—
EXERCISE10b5-1
Puri Sumeet · Chief Accounting Officer
Tx Sep 14·Filed Sep 16·EDGAR ↗
87,500 sh
—
BUY
Song Haiyan · Insider
Tx Sep 14·Filed Sep 15·EDGAR ↗
5,000 sh @ $3.84
$19K
BUY
Song Haiyan · Insider
Tx Sep 11·Filed Sep 15·EDGAR ↗
10,000 sh @ $3.95
$40K
SELL10b5-1
Puri Sumeet · Chief Accounting Officer
Tx Sep 9·Filed Sep 9·EDGAR ↗
34,167 sh @ $4.13
$141K
EXERCISE10b5-1
Puri Sumeet · Chief Accounting Officer
Tx Sep 5·Filed Sep 9·EDGAR ↗
68,333 sh
—
EXERCISE
Urban David · Insider
Tx Jul 21·Filed Aug 6·EDGAR ↗
12,185 sh @ $5.48
$67K
EXERCISE
Mastrangelo Joe · Chief Executive Officer
Tx Jul 21·Filed Aug 6·EDGAR ↗
111,118 sh @ $5.48
$609K
EXERCISE
Buczkowski Michelle · Chief Administration Officer
Tx Jul 21·Filed Aug 6·EDGAR ↗
2,585 sh @ $5.48
$14K
EXERCISE
Dimitrief Alexander · Insider
Tx Jul 21·Filed Aug 6·EDGAR ↗
1,377 sh @ $5.48
$8K
EXERCISE
Dimitrief Alexander · Insider
Tx Jul 21·Filed Aug 6·EDGAR ↗
17,897 sh @ $5.48
$98K
EXERCISE
Nigro Joseph · Insider
Tx Jul 21·Filed Aug 6·EDGAR ↗
2,773 sh @ $5.48
$15K
EXERCISE
Kroeker Nathan · Chief Commercial Officer
Tx Jul 21·Filed Aug 6·EDGAR ↗
16,944 sh @ $5.48
$93K
EXERCISE
Bornstein Jeffrey S · Insider
Tx Jul 21·Filed Aug 6·EDGAR ↗
9,558 sh @ $5.48
$52K
EXERCISE
Demby Claude · Insider
Tx Jul 21·Filed Aug 6·EDGAR ↗
1,825 sh @ $5.48
$10K
EXERCISE
Walters Marian · Insider
Tx Jul 21·Filed Aug 6·EDGAR ↗
11,407 sh @ $5.48
$63K
SELL10b5-1
Puri Sumeet · Chief Accounting Officer
Tx Jul 28·Filed Jul 28·EDGAR ↗
29,167 sh @ $3.36
$98K
SELL10b5-1
Kroeker Nathan · Chief Commercial Officer
Tx Jul 28·Filed Jul 28·EDGAR ↗
110,417 sh @ $3.36
$371K
SELL
Mastrangelo Joe · Chief Executive Officer
Tx Jul 27·Filed Jul 28·EDGAR ↗
159,154 sh @ $3.61
$575K
EXERCISE10b5-1
Puri Sumeet · Chief Accounting Officer
Tx Jul 25·Filed Jul 28·EDGAR ↗
58,334 sh
—
EXERCISE10b5-1
Kroeker Nathan · Chief Commercial Officer
Tx Jul 25·Filed Jul 28·EDGAR ↗
220,834 sh
—
EXERCISE
Mastrangelo Joe · Chief Executive Officer
Tx Jul 25·Filed Jul 28·EDGAR ↗
333,334 sh
—
SELL10b5-1
Kroeker Nathan · CCO and Interim CFO
Tx Jul 7·Filed Jul 7·EDGAR ↗
79,309 sh @ $4.68
$371K
TAX
Mastrangelo Joe · Chief Executive Officer
Tx Jul 6·Filed Jul 7·EDGAR ↗
121,245 sh @ $5.06
$614K
EXERCISE
Mastrangelo Joe · Chief Executive Officer
Tx Jul 5·Filed Jul 7·EDGAR ↗
254,304 sh
—
EXERCISE10b5-1
Kroeker Nathan · CCO and Interim CFO
Tx Jul 5·Filed Jul 7·EDGAR ↗
105,008 sh
—
EXERCISE10b5-1
Kroeker Nathan · CCO and Interim CFO
Tx Jul 3·Filed Jul 7·EDGAR ↗
53,610 sh
—
SELL10b5-1
Buczkowski Michelle · Chief Administration Officer
Tx Jun 30·Filed Jun 30·EDGAR ↗
11,469 sh @ $5.87
$67K
SELL10b5-1
Kroeker Nathan · CCO and Interim CFO
Tx Jun 30·Filed Jun 30·EDGAR ↗
35,289 sh @ $5.86
$207K
SELL10b5-1
Silberman Michael W · Chief Legal Officer
Tx Jun 30·Filed Jun 30·EDGAR ↗
14,998 sh @ $5.87
$88K
TAX
Mastrangelo Joe · Chief Executive Officer
Tx Jun 30·Filed Jun 30·EDGAR ↗
60,703 sh @ $6.09
$370K
SELL10b5-1
Puri Sumeet · Chief Accounting Officer
Tx Jun 30·Filed Jun 30·EDGAR ↗
8,823 sh @ $5.86
$52K
EXERCISE10b5-1
Puri Sumeet · Chief Accounting Officer
Tx Jun 26·Filed Jun 30·EDGAR ↗
17,645 sh
—
EXERCISE
Mastrangelo Joe · Chief Executive Officer
Tx Jun 26·Filed Jun 30·EDGAR ↗
130,570 sh
—
EXERCISE10b5-1
Buczkowski Michelle · Chief Administration Officer
Tx Jun 26·Filed Jun 30·EDGAR ↗
22,938 sh
—
EXERCISE10b5-1
Silberman Michael W · Chief Legal Officer
Tx Jun 26·Filed Jun 30·EDGAR ↗
29,996 sh
—
EXERCISE10b5-1
Kroeker Nathan · CCO and Interim CFO
Tx Jun 26·Filed Jun 30·EDGAR ↗
70,578 sh
—
TAX
Mastrangelo Joe · Chief Executive Officer
Tx Jun 12·Filed Jun 15·EDGAR ↗
116,646 sh @ $6.06
$707K
EXERCISE
Mastrangelo Joe · Chief Executive Officer
Tx Jun 12·Filed Jun 15·EDGAR ↗
200,000 sh @ $1.34
$268K
EXERCISE
Nigro Joseph · Insider
Tx Jun 2·Filed Jun 3·EDGAR ↗
3,565 sh
—
EXERCISE
Walters Marian · Insider
Tx Jun 2·Filed Jun 3·EDGAR ↗
1,782 sh
—
EXERCISE
Walters Marian · Insider
Tx May 20·Filed May 22·EDGAR ↗
22,319 sh @ $1.18
$26K
SELL
Walters Marian · Insider
Tx May 20·Filed May 22·EDGAR ↗
22,319 sh @ $7.20
$161K
OTHER
Bornstein Jeffrey S · Insider
Tx May 19·Filed May 19·EDGAR ↗
12,326 sh @ $6.88
$85K
EXERCISE
Bornstein Jeffrey S · Insider
Tx May 19·Filed May 19·EDGAR ↗
30,815 sh
—
OTHER
Demby Claude · Insider
Tx May 19·Filed May 19·EDGAR ↗
9,244 sh @ $6.88
$64K
EXERCISE
Demby Claude · Insider
Tx May 19·Filed May 19·EDGAR ↗
23,111 sh
—
OTHER
Dimitrief Alexander · Insider
Tx May 19·Filed May 19·EDGAR ↗
10,785 sh @ $6.88
$74K

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About EOSE insider trading data

Form 4 is the SEC filing required when an officer, director, or 10% owner of a public company buys or sells the company's stock. By law, these filings must be submitted within two business days of the trade. Tracenotes pulls every Form 4 filing for EOSE from EDGAR, parses it, and surfaces the activity on this page.

What insider buying tells you. Open-market purchases by insiders are widely studied as a meaningful signal. Unlike stock awards (which are compensation, not conviction), an executive spending their own money to buy shares of the company they run is a vote of confidence. Studies have found insider-buying clusters — three or more insiders buying within a short window — outperform the broader market over the following year.

What insider selling tells you. Selling is noisier. Many sales are pre-scheduled under SEC Rule 10b5-1 plans, which let insiders sell on a fixed schedule regardless of company news. We label these "10b5-1" so you can see them. Discretionary sales — sales not tied to a plan — are more meaningful, especially when multiple insiders sell in quick succession.

Tracenotes methodology. We scan EDGAR daily for new Form 4 filings, parse them into individual transactions, and detect clusters when three or more distinct insiders buy or sell within a 14-day window. The data on this page covers the last 12 months. For deeper analysis, Tracenotes also runs language-change detection on 10-K and 10-Q filings — that's our core product.

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Frequently asked questions

What is a Form 4 filing?

Form 4 is the SEC disclosure required when a company insider — an officer, director, or 10% owner — buys or sells the company's stock. By law these filings must be submitted within two business days of the trade.

Is insider buying EOSE always bullish?

Open-market purchases by insiders are widely viewed as a bullish signal because executives are spending their own money. Stock awards and option exercises are part of compensation and don't carry the same weight, which is why we treat them separately on this page.

What is a 10b5-1 trade?

A trade made under SEC Rule 10b5-1, which lets insiders pre-schedule sales weeks or months in advance. These sales execute on a fixed plan regardless of company news, so they're a weaker signal than discretionary sales. We label them with a "10b5-1" tag.

What is an insider cluster?

A cluster is when three or more distinct insiders buy or sell within a 14-day window. Clusters are studied as stronger signals than single trades because multiple people independently reach the same view. We surface active clusters on Eos Energy Enterprises, Inc. (EOSE) when they form.

Where does EOSE insider trading data come from?

Every Form 4 filing for EOSE is sourced directly from SEC EDGAR. Tracenotes scans EDGAR daily, parses each Form 4 into individual transactions, and updates this page within hours of new filings.

Nothing on this page constitutes investment advice. Form 4 data is sourced from SEC EDGAR and provided for research purposes only.

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